Research on the Traffic and Terrain Collision Avoidance System
|School||Nanjing University of Aeronautics and Astronautics|
|Course||Control Theory and Control Engineering|
|Keywords||T~2CAS System design Alarm algorithm Simulation platform Seaworthy|
Traffic and terrain collision avoidance system is necessary avionics equipments in civil aviationwhich has significant meaning in airplane safety flight, and it is a hot topic in the field of civilaviation. In order to further improve the safety and airworthiness of civil aviation aircraft, this papercombined air crash system with ground proximity warning system for organic integration, anddeveloped a comprehensive automatic alarm system. When the plane flies approach to other invasionplanes or ground risk, crew could be provided alarm information through the informationcomprehensive processing.Firstly, the working principle and block diagrams of the air collision avoidance system andground proximity warning system was analyzed in this paper, and structure configurations of anintegrated warning system was presented. This paper also analyzed their working principles anddetermined constitution and function of the input/output module and other modules such as alarmcomputer module.Secondly, the alarm thresholds under several models were designed by the simulation experimentstatistics, the plane model, terrain model and other key factors were introduced. Through the curvefitting technique, the alarm threshold value curve can be obtained. On this basis, information fusionlogic and real-time alarm algorithm were designed, which can realize the function of automaticcomprehensive alarm system alarm. In order to meet the airworthiness requirements of the alarmsystem, this paper provided the airworthiness review and compliance verification methods. The designof an integrated warning system was guided by the research results.Finally, in order to verify the comprehensive alarm algorithm developed in this paper, thetraffic and terrain collision avoidance system three-dimensional simulation platform was setup. This simulation platform had the function of audible alarm, showing alarm curve, the invasion aircraft display and terrain features, which can visually verify rationality of alarm threshold curve and feasibility of alarm algorithm.